Box blank



FIG. 1 is a top plan view of a box blank embodying my new design, the bottom plan view being substantially the same in appearance; and

FIG. 2 is a top plan view of a box blank showing a modified form of my new design, the bottom plan view being substantially the same in appearance.

The box blank is constructed of material of conventional thickness and the dashed lines in the drawing represent fold lines. 

The ornamental design for a box blank, substantially as shown and described. 